Scow for transporting gravel and the like.



T. 0. JAGKSON. SCOW FOB. TRANSPORTING GRAVEL AND THE LIKE.

' APPLIUATION FILED 001213, 1911. I

1,018,565. Patented Feb. 27, 1912.

2 SHEETS-$113151 1.

COLUMBIA PLANOORAPH 10., WASHINGTON, u. c.

T. c. JACKSON. SGOW FOR TRANSPOETING GRAVEL AND THE LIKE. APPLICATIONFILED OOT.13, 1911.

1,018,565. Patented Feb. 27, 1912.

2 8HEBT8-SHIIET 2.

COLUMBIA PLANOGRAPH c0.. WASHINGTON, l). c.

UNITED STATES PATENT OFFICE.

THOMAS C. JACKSON, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-THIRD TO ROSEJ. A.

SHANKS, OF CHICAGO, ILLINOIS.

SCOW FOR TRANSPOR-TING GRAVEL AND THE LIKE.

Specification of Letters Patent. Application filed. October 13, 1911.

To all whom it may concern:

Be it known that I, THOMAS (J. JACKSON, a citizen of the United States,and a resident of Chicago, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in Scows forTransporting Gravel and the Like; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the characters ofreference marked thereon, which form a part of this specification.

This invention relates to a novel scow or boat for transporting gravelor gravel and sand loaded thereon from the bottom of a lake or otherbody of water, and the invention relates more specifically to means forreceiving the material in the compartments of the scow so as to gradethe material in predetermined meshes, or to return the material which isof too fine a mesh for use back to the bottom of the body of water fromwhich it was taken.

The invention consists in the matters hereinafter set forth and moreparticularly pointed out in the appended claims.

In the drawings-Figure 1 is a plan view of a scow equipped with myinvention; Fig. 2 is a transverse section thereof; Fig. 3 is afragmentary plan view of the screens of one compartment, with certain ofthe screens broken away to show the relative meshes of the screens; Fig.1 is an enlarged transverse sectional view on the line t4 of Fig. 2;

Fig. 5 is a fragmentary vertical section taken through the screens,showing a modification. Fig. 6 is an enlarged section through one of thebulk heads between the compartments, showing the brackets for supportingthe screens.

The scow 10 may be of any suitable or preferred construction or design,and is herein shown as a self-propelled scow, with its propelling powerplant 11 located at the stern, and its pilot house 12 located near thebow.

Disposed along the longitudinal center of the scow are a'plurality ofcompartments 15, 15, seven being herein shown, which are separated fromeach other by the transverse bulk heads or partitions 16. Each of saidcompartments is provided with swinging dumping doors 17, that are hingedat their sides to the sides of the compartment at the bottom thereof.Said doors when swung upwardly to the dotted line position shown in Fig.2, constitute the bottoms of the compartments, and when released swingdown to the full line positions shown in Fig. 2 to permit the contentsof the compartments to be dumped. The doors are held in their upper orclosed positions by the chains 19 that are trained about the liftingwindlasses 20, 20 at the sides of the compartments on the scow deck.

Located above and at the sides of the-compartments are fiumes 22, 22through which the mixture of water, gravel and sand is distributed tothe several compartments, each fiume being provided over eachcompartment with a discharge opening 23 through which the mixture fallsfrom the flumes to the compartments below. The mixture of water, graveland sand is discharged into said fiumes through the usual sucker pipe 25at the side of the scow and the pumps 26 which are located midships atthe sides of the compartments 15. The outlet pipes 27,27 of said pumpsdischarge centrally into the flumes through the openings 28. The engines29, which operate said pumps, may receive steam from the boilers of thepropelling power plant when the scow is self-propelled.

The construction just described constitutes, in itself, no part of thepresent invention, although my improvements are very advantageouslyadapted to said construction. The mixture of gravel, sand and water isdischarged centrally into the flumes, from which the central compartmentis first filled, after which the compartments toward the ends of thescow are gradually filled in the usual manner.

In accordance with my invention the com partments are provided withsupporting and grading screens which extend from side to side and end toend of the compartments and may be removably supported on brackets 35,36 attached to the lateral sides and bulk heads of the compartments. Asherein shown each compartment is equipped with three superposedsupporting and grading or separating screens 37, 38, 39; and in thisarrangement the lowest screen is of the finest mesh, the top screen thecoarsest mesh and the intermediate screen is of a mesh between the twoextremes.

Preferably, and in order to facilitate the assembling of the screens andthe removal thereof, said screens, or at least the middle and bottomscreens, are each made of a num-- up along the inner sides of the door,through clearance openings or notches 4.2 at the sides of the screens,as shown in full lines in Fig. 2.

In the use of the scow equipped with the screens, the large stonesdischarged from the fiumes into. the compartments are intercepted by theupper screen, while the remainder of the material passes to theintermediate screen. Said intermediate screen intercepts the largerparticles of material which fall thereon, allowing the remainder to fallto the lowermost screen where the finest material intended for use isintercepted, while allowing the fine sand to fall through said lowestscreen back to the bottom of the body of water. In this manner thegranular material is automatically graded into the different meshesdesired, while the scow is being loaded, thereby facilitating thehandling of the material at the dock, and rendering it unnecessary totransport a large tonnage of material having little or no value, to-wit,the fine or so-called torpedo sand.

In some locations a smaller number of screens may be employed, as forinstance, where the gravel handled runs fairly uniform as to size.

In cases where it is desired to save the finest sand an imperforateplate may be substituted for the lowermost screen, and one or morescreens used above the same to grade or separate the gravel and sand.

In order to facilitate the passage of the water from the body of thegravel in the compartments, I may provide each compartment with one ormore pipes 45, as shown in Fig. 5, which extend upwardly from the bottomscreen through the compartment. These vertical pipes are perforated topermit the water to flow thereinto and thence downwardly through thelower end thereof into the water below. The perforations in said pipesare suificiently small to avoid the leakage into the pipes of gravel ofa size which is to be intercepted and retained by the finest screenemployed in the equipment. The pipes 45 are preferably made ofrelatively short sections which are joined end to end by flanges 46which may be bolted, or otherwise secured together.

WVhen the screens are made in sections, as shown in Fig. 3, the marginsof the central screens and the inner margins of the side screens may beformed with opposed halfround recesses which, when the sections areapplication fitted together, constitute openings to receive said pipes.The pipes do not extend through the top screens. preferably made ofrelatively heavy steel plates perforated to the desired mesh so as to besufiiciently stiff to support the loads brought thereon.

In lieu of the plain screens, I may employ the box screens shown in mycopending for U. S. Letters Patent, filed of even date herewith, SerialNumber 654:,A53. In the latter form of screen, each compartment isequipped with a plurality of closelynested boxes removably supported inthe compartment. The bottoms of the boxes constitute the screens forgrading the material, and the side walls may be perforated to permit theready escape of water therefrom. The several sections constitute unitswhich may be separately handled, thus facilitating the unloading of thegraded material from the scow.

I may apply my improvements to a scow designed only for transportinggravel and sand, in which event the dumping doors may be dispensed with.The use of the screens removably fitted in the compartments of a dumpingscow, however, possesses the advantage of enabling the scow to be usedfor both classes of work. Thus the scow shown may be employed totransport refuse material out to sea, and after the load is dumped thescow may be equipped with the screens and loaded with gravel to betransported to shore on thereturn trip of the scow.

The construction of the scow shown affords ample space to carry thescreen equipment when not in use.

I claim as my invention 1- 1. A scow having a compartment which is openat its top and at its bottom and a supporting and separating screen formaterial extending across the compartment between the top and the bottomthereof and supported on the walls of the compartment.

2. A scow having a compartment which is open at its top and at itsbottom, a plurality of superposed supporting and separating screens formaterial extending across the compartment and supported on the sidewalls thereof, the mesh of the upper screen being larger than the meshof the lower screen, substantially as described.

3. A scow provided with a longitudinally arranged series of compartmentswhich are open at their tops and at their bottoms, and supporting andseparating screens for material arranged across the compartments betweentheir tops and bottoms thereof, and supported on the walls thereof.

4. A scow provided with a longitudinally arranged series of opencompartments which are separated by transversely arranged bulk heads,and supporting and sep- Said screens are arating screens for materialextending across said compartments, between the tops and bottomsthereof, with means on the Walls of the compartments for removablysupporting the screens in place.

5. p A scow provided with a longitudinally arranged series ofcompartments which are open at their tops and at their bottoms, andseparated by transverse bulk heads, each compartment being provided withsuperposed supporting and separating screens for material extendingthereacross and removably supported in the compartments, said screensdiminishing in mesh from the upper to the lower screens.

6. A scow provided with a longitudinally arranged series of compartmentswhich are open at their tops and at their bottoms, superposed supportingand separating screens for material in each compartment, the up permostscreen being of larger mesh than the lower screen, and brackets on thewalls of said compartments upon which the screens are removablysupported.

7. A scow provided with a longitudinally arranged series of opencompartments, dumping doors at the lower sides of the compartmentsarranged, when swung upwardly, to constitute the bottoms of thecompartments, with means for holding the doors in their upper positions,and supporting and separating screens for material placed across thecompartments and supported on the walls thereof between the tops and thebottoms of said compartments.

8. A scow provided with a longitudinally arranged series of opencompartments, dumping doors at the lower sides of the compartmentsarranged, when swung upwardly, to constitute the bottoms of thecompartments, with means for holding the doors in their upper positions,and a plurality of superposed supporting and separating screens formaterial of graduated mesh extending across and removably supported insaid compartments.

9. A scow provided with a longitudinally arranged series of opencompartments, dumping doors at the lower sides of the compartmentsarranged, when swung upwardly, to constitute the bot-toms of thecompartments, chains and windlasses for holding the dumping doors intheir uppermost positions and supporting and separating screens formaterial extending across and removably supported on the walls of saidcompartments, the screens being provided with marginal notches throughwhich the chains extend when the doors are swung down.

10. A scow provided with a longitudinally arranged series ofcompartments open at their tops and at their bottoms, a fiume arrangedabove and at the side of said compartments, with means for deliveringgranular material and water thereto, said fiume being provided with adischarge opening through which the material is discharged in to thecompartments, and screens extending across the compartments between theupper and lower sides thereof.

11. A scow provided with a longitudinally arranged series ofcompartments which are open at their tops and at their bot-toms, a fiumearranged above and at the side of said compartments, with means fordelivering granular material and Water thereto, said fiume beingprovided with discharge openings through which the material isdischarged into the compartments, and superposed screens of graduatedmesh in each compartment, extending thereacross between the tops andbottoms thereof.

12. A scow provided with a longitudinally arranged series ofcompartments which are open at their tops and at their bottoms, a fiumearranged above and at the side of the compartments, with means fordelivering granular material and water thereto, said fiume beingprovided with a discharge opening through'which the material isdischarged into the compartments, screens extending across thecompartments between the tops and bottoms thereof and perforated pipesextending through said screens and extending upwardly through thecompartment.

13. A scow comprising a compartment which is open at its top and at itsbottom, a separating and supporting screens for material extendingacross the compartment between its top and its bottom and supported onthe walls thereof, and a perforated pipe extending upwardly above thescreen and open at its lower end to the space below the screen.

14:. A scow having a compartment which is open at its top and at itsbottom, a separating and supporting screen for material composed of aplurality of screen sections extending across said compartment, andbrackets on the side walls of the compartment for removably supportingthe sectional screen.

In testimony, that I claim the foregoing as my invention I aiiix mysignature in the presence of two witnesses, this 5th day of October, A.D. 1911.

THOMAS C. JACKSON.

WVitnesses:

GERTRUDE E. DOWLE, W'. L. HALL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

